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<title>Data-File format</title>
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    <a href="SP_0_Main.htm"><img src="images/abacus.gif" border="0" width="32" height="32" alt="Calc." title="Calc."></a>&nbsp;</td>
    <td align="left" valign="middle"><font size="-1"><a href="SP_0_Main.htm">SED &amp; PREDOM</a></font></td>
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<h2>Input Data-File format</h2>

<p>Input data files for <a href="SP_SED.htm">SED</a> and
<a href="SP_PREDOM.htm">PREDOM</a> have names ending with
<nobr>&#147;<b>dat</b>&#148;.</nobr></p>

<p>Data files are plain text files and may be edited with any text editor.</p>

<p><a href="SP_Names_Numbers.htm">How to write <i>Names and Numbers</i></a>&nbsp;
in data files.</p>

<p>Structure of data files:</p>
<table cellspacing="0" cellpadding="0" border="0">
<tr valign="top"><td><tt>&nbsp;&nbsp;&nbsp;</tt></td>
		<td><nobr><b>1</b>)&nbsp;</nobr></td>
		<td><nobr><a href="SP_Data_File_Chemical_System.htm">the chemical system</a></nobr></td>
</tr><tr valign="top"><td></td>
		<td><nobr><b>2</b>)&nbsp;</nobr></td>
		<td><a href="SP_Data_File_Plot.htm">diagram type</a> and</td>
</tr></tr><tr valign="top"><td></td>
		<td><nobr><b>3</b>)&nbsp;</nobr></td>
		<td><a href="SP_Data_File_Concs.htm">concentrations for each chemical component</a>.</td>
</tr></table>

<p><b>Title:</b> The first line after the concentrations (if found, and not empty)
is used as a <b><u>title</u></b> for the diagram. After that, any number of lines
with comments may be added.</p>

<p>Several input file <a href="Tut_Example_Files.htm">examples</a> are found in subdirectory
<nobr>&#147;.\EXAMPLES&#148;.</nobr></p>

<p>Using <a href="DB_0_Main.htm">DATABASE</a> is the easiest way to create data files:
from equilibrium constants available in an electronic database.
The program <a href="S_0_Main.htm">SPANA</a> may be used to
<a href="S_Modify_Chem_System.htm">modify the chemical system</a>:
remove components, interchange components for reaction products, deactivate species, etc.</p>

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